CN220435567U

CN220435567U - Poppet valve

Info

Publication number: CN220435567U
Application number: CN202321916511.9U
Authority: CN
Inventors: 崔科; 舒荣波
Original assignee: Primo Intelligent Technology Shanghai Co ltd
Current assignee: Primo Intelligent Technology Shanghai Co ltd
Priority date: 2023-07-20
Filing date: 2023-07-20
Publication date: 2024-02-02
Anticipated expiration: 2033-07-20

Abstract

A lift valve comprises a valve core composed of a movable iron core, a guide ring, a mounting snap ring, an elastic compensation O-shaped sealing ring, a T-shaped sealing ring, a support, a sealing gasket support and an outer sealing O-shaped ring, wherein the valve core is arranged in a central hole in a valve body; the electromagnet coil drives the movable iron core, and the movable iron core drives the sealing gasket support and the sealing gasket to move up and down so as to realize the flow direction switching of the passages among the air inlet, the air outlet and the air outlet. The dynamic sealing effect on the valve core rod is good, and the sealing element system has certain elasticity and leakage compensation function; the utility model has pressure balance design and can be used for controlling high-pressure gas or liquid.

Description

Poppet valve

Technical Field

The utility model relates to the technical field of valve preparation, in particular to a valve with a compensation and double sealing structure, namely a poppet valve, which is an electric control valve used for fluid switch and flow direction switching control.

Background

The fluid comprises liquid and gas, and the electric control valve is a key device for controlling the fluid. In the control of flow direction switching and switching, electronically controlled valves are increasingly used. The electric control valve has the advantages of simple control, good sealing, low energy consumption, low cost and the like when in use. Electronically controlled poppet valves are a valve of wide application.

The static seal and the dynamic seal are divided according to whether displacement change exists between the sealing element and the contact part; the medium flow direction in the valve and the switch switching are realized by the dynamic sealing of the valve core. Elastic deformation of rubber seals using O-rings is the most commonly used form of sealing (traditional form of sealing), but its friction is large and not wear resistant, and the rubber properties are greatly affected by temperature changes. Another common form of dynamic sealing is a hard seal, which has the disadvantages of poor sealing effect, susceptibility to wear, and susceptibility to the cleanliness of the flowing medium. Both sealing forms are not able to meet the long working life requirements of the valves currently on the market.

CN2021212381480 discloses a sealing washer for two-way seal valve, relates to the sealing washer field, the on-line screen storage device comprises a base, the base top is equipped with the top cap, be equipped with outer sealing washer and interior sealing washer between top cap and the base, base top surface fixedly connected with compensation connecting seat, the inside and outside both sides of compensation connecting seat all are equipped with the embedded groove, the inside and outside both sides surface of compensation connecting seat all fixedly connected with compensation gasbag, compensation air flue has been seted up to the inside compensation air flue, the air inlet has been seted up on the compensation air flue, the inside closing plate that is equipped with of air inlet. According to the utility model, the air inlet is used for inflating the compensation air passage, and the two compensation air bags are inflated by the compensation air passage, so that the outer sealing ring and the inner sealing ring can deform to be tightly attached to the valve body, and therefore, the compensation effect can be carried out when abrasion occurs, and the sealing performance is ensured.

CN113544381 discloses a poppet valve, in particular a gate valve, having a longitudinal axis (L), a valve seat with a plurality of valve seat channels, a sealing element arranged at a distance from the valve seat in the direction of the longitudinal axis (L) and capable of opening and closing the valve seat channels, at least one of the valve parts formed as a valve seat having a plurality of channel defining sections and a plurality of rib sections, wherein the channel defining sections form valve seat channels and/or collector channels, wherein the channel defining sections and the rib sections each extend at an angle (α) to each other, wherein at least one of the valve parts forming the valve seat (12)) is at least partially made from additive manufacturing.

Disclosure of Invention

The utility model aims to provide the at least two-position three-way valve, which has a gas pressure balance structure, a compensation sealing structure and a good sealing effect on valve moving parts, particularly on a valve core rod, and has certain elasticity and leakage compensation function, and the working life of the valve is not influenced because the friction force is not large during the action.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a lift valve comprises a valve core composed of a movable iron core, a guide ring, a mounting snap ring, an elastic compensation O-shaped sealing ring, a T-shaped sealing ring, a support, a sealing gasket support and an outer sealing O-shaped ring, wherein the valve core is arranged in a central hole in a valve body; the electromagnet coil drives the movable iron core, and the movable iron core drives the sealing gasket support and the sealing gasket to move up and down so as to realize the flow direction switching of the passages among the air inlet, the air outlet and the air outlet. The air outlet is communicated with the air outlet when the power is off, and the air inlet is communicated with the air outlet when the power is on. Thereby achieving the function of a poppet valve.

Further, the structure of the compensating seal device is as follows: the end face of the mounting retaining ring is of a circular groove structure, and is matched with one end of the supporting ring to limit and position the T-shaped ring and the elastic compensation O-shaped ring.

Further, one side surface of the valve (housing) may be provided with a fluid inlet (fluid inlet) and a fluid outlet, and the aligned side surface is provided with a fluid outlet (fluid outlet).

Further, the movable iron core, the mounting retaining ring, the elastic compensation O-shaped ring, the T-shaped sealing ring, the support, the sealing gasket and the sealing gasket support form a valve core, and the movable iron core and the sealing part support ring are assembled together in a riveting mode.

Further, one side surface of the valve body is provided with a fluid inlet and a fluid outlet, and the aligned side surface is provided with a gas outlet.

Further, through holes are formed in the middle of the movable iron core, the upper and lower parts of the valve core are subjected to air pressure, and the air pressure of the upper and lower parts of the valve core is balanced by controlling the air pressure acting force area.

The utility model has the beneficial effects that: the dynamic sealing effect on the valve core rod is good, the sealing element system has certain elasticity and leakage compensation function (compensation for small amount of abrasion), the friction force of the valve core rod is small when the valve core rod moves, the service life of the valve can be prolonged, the requirement on electromagnetic force is low when the valve is switched, and the energy consumption is saved; the valve has simple sealing structure and low cost, but has the advantages of both hard sealing and elastic sealing. The gas circuit and the liquid circuit can be used universally, and are particularly used for various pneumatic and electric valves; the utility model has pressure balance design, can be used for controlling high-pressure gas or liquid, and is not required to design large valve opening force (electromagnetic valve opening force with excessive energy consumption). The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged schematic view of the seal structure of the present utility model;

FIG. 3 is a schematic diagram of the pressure equalization design of the present utility model, represented by the arrows in the figure.

The diagram is: 1-1 movable iron core thick section, 1-2 movable iron core thin section, 2-guide ring, 3-installation buckle ring, 4-elastic compensation O-shaped sealing ring, 5-T-shaped ring, 6-bracket, 7-gasket, 8-gasket bracket, 9-valve body, 10-outside O-shaped sealing ring, 11-air inlet, 12-air outlet and 13-air outlet.

The specific embodiment is as follows:

the present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

Referring to fig. 1-2, the poppet valve is a two-position three-way valve, wherein a valve core is formed by a movable iron core (valve core rod), a guide ring, a mounting snap ring, an elastic compensation O-shaped sealing ring, a T-shaped sealing ring, a support, a sealing gasket support and an outer sealing ring, and the valve body is provided with an 11-air inlet, a 12-air outlet and a 13-air outlet in a through hole in the center of the valve body; an electromagnet coil is arranged above the valve body, the upper end of the movable iron core, namely the movable iron core thick section, is positioned in the electromagnet coil, and the movable iron core acts to drive the sealing gasket support and the sealing gasket (two) to move up and down so as to realize flow direction switching. When the electromagnetic coil is electrified, the electromagnetic coil generates electromagnetic force to drive the movable iron core (valve core rod), so as to drive the sealing gasket and the sealing gasket support to seal the valve port of the support, the air inlet is communicated with the air outlet, and the air outlet is disconnected; when the power is off, the electromagnetic force disappears, the movable iron core drives the sealing pad and the sealing pad support to seal the valve port of the valve body under the action of the spring, the air outlet is communicated with the air outlet, and the air inlet is disconnected. Thereby constituting the basic function of the poppet valve. The sealing gasket and the sealing gasket support are sleeved on the movable iron core and fixed with the movable iron core.

The electromagnetic valve works in the following way: two-position tee joint; power-on state: the air inlet is communicated with the air outlet, and the air outlet is disconnected; and (3) power-off state: the air outlet is communicated with the air outlet, and the air inlet is disconnected; the left side is provided with 12-air outlets, the right side is provided with 11-air inlets and 13-air outlets, and the air inlets and the air outlets are on the same side.

And (3) designing balance pressure: the gas enters from the gas inlet and enters into the upper end of the valve core through the central hole of the valve core rod, and the air pressure is arranged above the valve core rod due to the effect of the sealing element. The upper end and the lower end of the valve core rod are communicated with each other by air pressure. Therefore, the valve core rod is only influenced by the spring force (and the friction force of the valve core rod) and electromagnetic force which can be applied to the valve core rod in the lifting process, is not influenced by the gas pressure, and can be used for stopping and opening a high-pressure liquid flow channel without particularly large electromagnetic valve opening force. As shown in fig. 3, the gas flow path of the valve is indicated by arrows up to the spool.

The mounting clasp 4-1 has an annular circular groove structure, and the circular groove limits and positions the T-shaped ring and the O-shaped ring.

The T-shaped ring is made of a low-elasticity high polymer material, such as PET, polytetrafluoroethylene and the like, and is a quasi-hard seal capable of ensuring certain low elasticity. The narrow internal measurement of T type circle is contacted with the case pole, and the internal diameter of T type circle is close with the diameter of case pole, and under the hooping of rubber O shape circle and elastic action, T type circle has a shrink deformation on structure (inboard narrow limit) and is used for sealedly, even the inner circle has wearing and tearing, also receives the elasticity compensation of rubber O shape circle to guarantee the sealing performance to the case pole, can have both mechanical seal and elastic seal's advantage in fact.

Preferably, the width of the inner narrow side of the T-shaped ring is about 1mm, so that the T-shaped ring and the valve core rod have a relatively small contact area, and friction force is reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the utility model.

Claims

1. A lift valve is characterized by comprising a valve core composed of a movable iron core, a guide ring, a mounting snap ring, an elastic compensation O-shaped sealing ring, a T-shaped sealing ring, a support, a sealing gasket support and an outer sealing O-shaped sealing ring, wherein the valve core is arranged in a central hole in a valve body; the electromagnet coil drives the movable iron core, and the movable iron core drives the sealing gasket support and the sealing gasket to move up and down so as to realize the flow direction switching of the passages among the air inlet, the air outlet and the air outlet.

2. The poppet valve of claim 1, wherein the mounting retaining ring has an end face with a rounded slot configuration that cooperates with an end of the bracket to define and position the T-ring and the elastomeric compensating O-ring.

3. The poppet valve of claim 1, wherein the plunger, mounting snap ring, elastomeric compensating O-ring, T-ring, bracket, gasket bracket comprise a spool, the plunger and the seal support ring being assembled by riveting.

4. The poppet valve of claim 1 wherein one side of the valve body has fluid inlet and outlet ports and the aligned side has an outlet port.

5. The poppet valve of claim 1, wherein the gasket and gasket support are moved by the plunger to effect flow direction switching with the valve ports on the valve body and support, respectively.

6. A poppet valve according to claim 3 wherein the plunger has a central through hole with the air inlet down, the valve element being pneumatically pressurized up and down through the central through hole, the valve element being pneumatically pressurized up and down by controlling the area of pneumatic force.